@mixin bg-image($url){
  background-image:url($url + "@2x.png") ;
  @media(-webkit-min-device-pixel-ratio: 3),(min-device-pixel-ratio: 3){
    background-image:url($url + "@3x.png") ;
  }
}

@mixin no-wrap(){
  text-overflow: ellipsis;
  overflow: hidden;
  white-space: nowrap;
}

@mixin extend-click(){
  position: relative;
  &:before{
    content:"";
    position: absolute;
    top:-10px;
    right:-10px;
    bottom:-10px;
    left:-10px;
  }
}
